Evidence row 2201895

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://file-formats.x402tookit.com/png-header"
    ]
  ],
  "name": "File Format Inspector",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Read a PNG's width, height, bit depth, colour type and interlace from its first 33 bytes, and verify the IHDR CRC.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "hex": "89504e470d0a1a0a0000000d49484452000000010000000108060000001f15c489"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T23:43:22.542Z",
              "bitDepth": 8,
              "bitsPerPixel": 32,
              "bytesExamined": 33,
              "colorType": 6,
              "colorTypeName": "truecolor with alpha (RGBA)",
              "degraded": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "height": 1,
              "ihdrCrcValid": true,
              "interlace": "none",
              "megapixels": 0,
              "notChecked": [
                "image data (IDAT) validity or decompression",
                "later chunks, palette, text or ICC profile contents",
                "…2 more"
              ],
              "rawBytesEstimate": 4,
              "reasons": [],
              "source": "computed locally (PNG specification, ISO/IEC 15948)",
              "summary": "1 x 1 px, truecolor with alpha (RGBA), 8-bit.",
              "verdict": "VALID_HEADER",
              "width": 1
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "hex": {
                      "description": "First 33 or more bytes of the PNG as hex (up to 512 bytes)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "hex"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "bitDepth": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "bitsPerPixel": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "bytesExamined": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "colorType": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "colorTypeName": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "height": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "ihdrCrcValid": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "interlace": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "megapixels": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "rawBytesEstimate": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "width": {
                      "type": [
                        "null",
                        "number"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:54:20.402Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:54:20.224Z"
    },
    "resource": "https://file-formats.x402tookit.com/png-header",
    "serviceName": "File Format Inspector",
    "tags": [
      "png",
      "image",
      "dimensions",
      "header"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Read a PNG's width, height, bit depth, colour type and interlace from its first 33 bytes, and verify the IHDR CRC."
}

What the leaf hashes

{"body":"c6a21d18331e01c3c0e4cff6028dbd4ebeace5fc76196421a63acee1afa6404f","id":2201895,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810086288,"prev":null,"subject":"x402_bazaar:https://file-formats.x402tookit.com/png-header","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0x463fb5f84e0b0ee110022da47124d679dde1aa668c66eb2d6bd465e06aa6dff0
2. 0x44a43ffe5861c910ec1f7dee88d9fb009256519c69f3c288234bf122760f0e1f
3. 0x9cc8e25d65e63b010d09a0e24c9b20d16b9f006eec8d33773a6bfca0f660d920
4. 0x9e1e068c11bdc26efe048c424d1e1aac48a51b090340b2731773eb31c7ee05fb
5. 0x3668bce89193fdf9d75a02a7860fd174cc7847ad06d6e6a2eb63350e4d5d6c20
6. 0x96bb38c656de745cbd2d7b7d59ef4a7409a086bb600b4e148e22d3eb2f7a0c2f
7. 0xd4ecc1c971bee367dc9d8e61294a1e34393339b569653919be37ce1af938a8b2
8. 0x0be69a2cb1dd3977b7ae840e8f25d2b739e820620b1cdc4616642f188b3d513c
9. 0xda298067c5e54dbbc3bc42c96fa0d6765a8fe58e18ffcafbdcf6407b06bd85be
10. 0x0c6e565159e4b5577c99b872830f5da674047aa9e76265b96992308f5382dffe
11. 0xd6ce0209d46ce7cf9a6c01eff144cf152770979661afa3b18a877e99ae9d7ef7
12. 0x774abba83e59d4a0d725432b7aa65c7fd5dc16c3ba4272951c2f4df287092b69
13. 0x95a273bb8932dab7d9961e32e3d3be866bd51e98c7772b268db2595e5869b5c4
14. 0x75634d9d67fe6c75f98d15ecdced550aaaa0b303b51c1355fcc39f82416bc504
15. 0x3217f821997a6d778dcf0814a25b1296c55ab77710c675e7b15695d25a6ce67d
16. 0x8760c227928c5295506cd8606e763f86cf8cd2a549820fab4dc86d29ca0d816d
17. 0xa20b9be86af7d690e040c9060a373b2fc5498edf3432f43c26f74fa2febc1e9a
18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af